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Chemical Identification
Common Name
Fludioxonil
中文通用名
咯菌腈
IUPAC
4-(2,2-difluoro-1,3-benzodioxol-4-yl)-1H-pyrrole-3-carbonitrile
CAS
4-(2,2-difluoro-1,3-benzodioxol-4-yl)-1H-pyrrole-3-carbonitrile
CAS No.
131341-86-1
Molecular Formula
C12H6F2N2O2
Molecular Structure
Category
Activity
Fludioxonil is a contact fungicide. It is effective against a wide range of ascomycete, basidiomycete and deuteromycete fungi. As a cereal seed treatment, it controls seed- and soil-borne diseases and gives particularly good control of Fusarium roseum and Gerlachia nivalis in small-grain cereals. As a potato seed treatment, fludioxonil gives broad-spectrum control of diseases including Rhizoctonia solaniwhen used as recommended. Fludioxonil does not affect seed germination. Applied as a foliar fungicide, it provides high levels of Botrytis control in various crops. The fungicide controls diseases on stems, leaves, flowers and fruits. Fludioxonil is active against benzimidazole-, dicarboximide- and guanidine-resistant fungi.

In field trials, fludioxonil gave better disease control than reference fungicides at similar or lower application rates. For control of Pythium spp and Phytophthora spp, it is recommended to mix fludioxonil with metalaxyl-M (mefenoxam; Apron XL).
CropUse
CropUses:
berry crops, cereals, oilseed rape, potatoes, pulses, sorghum, soybeans, stone fruit, sunflowers, turf, vegetables, vines

Cereal seed treatment

25 – 50 g ai/tonne seed

Potato tuber treatment

20 g ai/tonne

Vines

500 g ai/ha

Premix
Thiamethoxam+fludioxonil+metalaxyl-M
Thiamethoxam+fludioxonil+metalaxyl-M
thiamethoxam+fludioxonil+azoxystrobin+mefenoxam
Thiamethoxam+fludioxonil
thiamethoxam+difenoconazole+metalaxyl-M+sedaxane+fludioxonil
Thiamethoxam+difenoconazole+fludioxonil+metalaxyl-M
Thiamethoxam+azoxystrobin+fludioxonil+metalaxyl-M
Thiamethoxam+abamectin+azoxystrobin+fludioxonil+metalaxyl-M
Thiabendazole+Fludioxonil+Metalaxyl-M
Spinosad+thiamethoxam+R-metalaxyl+fludioxonil+azoxystrobin
sedaxane+fludioxonil+metalaxyl-M
Sedaxane+Fludioxonil
R-metalaxyl+fludioxonil+azoxystrobin+thiabendazole
Pyrimethanil+Fludioxonil
Pyraclostrobin+Fludioxonil+Clothianidin
Prochloraz+Fludioxonil
Pasteuria nishizawae+thiamethoxam+fludioxonil+mefenoxam+sedaxane
Metalaxyl-M+Fludioxonil+Triticonazole
Metalaxyl-M+Fludioxonil
Metalaxyl-M+Fludioxonil
Imidacloprid+Fludioxonil+Difenoconazole
Imazalil+Fludioxonil
Fludioxonil+Hymexazol
Fludioxonil+difenoconazole+thiamethoxam
Fludioxonil+cyprodinil
Fludioxonil+Clothianidin
Fludioxonil+Benzisothiazolinone
Fludioxonil+azoxystrobin+difenoconazole
Difenoconazole+Sedaxane+Fludioxonil
Difenoconazole+Sedaxane+Fludioxonil
difenoconazole+metalaxyl-M+sedaxane+fludioxonil
Difenoconazole+fludioxonil
Chlorothalonil+fludioxonil+propiconazole
Boscalid+Fludioxonil
Azoxystrobin+fludioxonil+metalaxyl-M+thiabendazole+thiamethoxam
Azoxystrobin+fludioxonil+metalaxyl-M+thiabendazole
Azoxystrobin+fludioxonil+metalaxyl-M
Azoxystrobin+fludioxonil
Seed treatment: water dispersible powder, flowable concentrate, powder (dry seed treatment). Foliar: water dispersible granule. 
Premix Parters: acetochlor clopyralid; bentazone thifensulfuron-methyl; clopyralid;
Physical Properties
Molecular weight:248.2; Physical form:Yellowish crystals. Density:1.54 (20 °C); Melting point:199.8 °C; Vapour pressure:3.9 ×10-4 mPa (25 °C); Henry constant:5.4 × 10-5 Pa m3 mol-1 ( calc.); Partition coefficient(n-octanol and water):logP = 4.12 (25 °C); pKa: pKa1 <0; pKa2 c. 14.1; Solubility:In water 1.8 mg/l (25 °C). In acetone 190, ethanol 44, toluene 2.7, n-octanol 20, hexane 0.0078 g/l (25 °C).; Stability:Practically no hydrolysis at 70 °C between pH 5 and 9.
Toxicology
Oral:Acute oral LD50 for rats and mice >5000 mg/ kg. Percutaneous:Acute percutaneous LD50 for rats >2000 mg/kg. Non-irritating to eyes and skin (rabbits). Non-sensitising to skin (guinea pigs). Inhalation: LC50 (4 h) for rats >2.6 mg/m3 air. ADI:( JMPR) 0.02 mg/ kg b.w. [1985].
Environmental Profile
Ecotoxicology: 
Algae: EC50 (72 h) for Scenedesmus subspicatus 0.93 mg/l; (120 h) for Selenastrum capricornutum 0.092 mg/l.Bees:Non-toxic; LD50 (48 h, oral) >329 μg/bee; LC50 (48 h, contact) >101 μg/bee.Birds:Acute oral LD50 for mallard ducks and bobwhite quail >2000 mg/kg. LC50 for mallard ducks and bobwhite quail >5200 ppm.Daphnia: LC50 (48 h) 1.1 mg/l.Fish: LC50 (96 h) for bluegill sunfish 0.31, catfish 0.63, common carp 1.5, rainbow trout 0.5 mg/l.Worms: LC50 (14 d) for Eisenia foetida >1000 mg/ kg soil.Other beneficial spp.:No long-term substantial reduction in major groups of zooplankton, bentic macro-invertebrates, emergent insects, peryphyton or phytoplankton. 

Environmental fate: 
Animals:Rapidly absorbed from the gastrointestinal tract into the general circulation and rapidly and almost completely excreted, via the faeces. The dominant metabolic pathway is oxidation of the pyrrole ring at the 2-position. A minor pathway is hydroxylation oSoil:Formation of bound residues is the major route for dissipation in soil; DT50 (lab.) 140-350 d, (field) 10-25 d. In leaching and adsorption/desorption experiments, the compound proved to be immobile in soil. Photolytic
Transport Information
Signal Word:CAUTION; Hazard Class:III(Slightly hazardous)

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